Parallel hybrid excitation brushless direct-current motor

Abstract

The invention discloses a parallel hybrid excitation brushless direct-current motor. The rotors of both a permanent-magnet synchronous motor and an electrical excitation double-salient-pole motor are arranged coaxially, and the stators are respectively arranged on the left side and the right side inside a shell; the iron cores of the stators share one set of armature winding; an excitation winding is arranged on the iron core of the stator of the electrical excitation double-salient-pole motor; the coils of all turns of all phases of armature windings of the hybrid excitation motor penetrate through two adjacent stator teeth in the same group of the permanent-magnet synchronous motor and corresponding stator poles of the electrical excitation double-salient-pole motor at the same time; the armature winding of the permanent-magnet synchronous motor has the same phase sequence and phase winding distribution as the armature winding of the electrical excitation double-salient-pole motor; and all phases of windings are winded on the stator teeth of the permanent-magnet synchronous motor and the stator poles of the electrical excitation double-salient-pole motor at the same time and closed after passing through the iron cores of the stators of the permanent-magnet synchronous motor and the electrical excitation double-salient-pole motor. The hybrid excitation motor has high winding utilization rate and wide air-gap magnetic field adjustment range and can effectively solve the problem on deexcitation protection during the short circuit inside the motor.

Description

technical field [0001] The invention relates to a parallel hybrid excitation motor, in particular to a parallel hybrid excitation brushless DC motor. Background technique [0002] Compared with traditional electrically excited motors, permanent magnet motors, especially rare earth permanent magnet motors, have significant advantages such as simple and reliable structure, high power density, and high efficiency. Under power generation operation, the output voltage will change with the change of load or speed. The electric excitation motor can adjust the DC or AC excitation current, so that the air gap magnetic field can be adjusted conveniently, but compared with the permanent magnet motor, the power density is low, and the structure is complex, especially when the excitation winding is on the rotor. Brushes are required, so it is difficult to achieve the motor Run at high speed. The hybrid excitation motor introduces auxiliary electric excitation windings on the basis of...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a parallel hybrid excitation brushless DC motor, which organically combines the permanent magnet synchronous motor part and the electric excitation double salient pole motor part, realizes the efficient superposition of the induced potential of the two parts, and solves the internal short circuit fault of the motor The problem of effective demagnetization protection in real time has important application value in aviation power supply, wind power generation and other fields

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